As i dont have WindowsXP, I cant show the ScreenShot, Just explained detailed for you below:

After pasting “MSWINSCK.OCX” file in “System32″ folder go to START > RUN and type “cmd” (eithout quotes) as shown below,

Now, press “ok” amd you will see the “Command prompt”

NOTE:- You must open “Command Prompt” as administrator. You can do that by going to Start > All programs > Accessories > Command Prompt Right click on “Command prompt” and select “Open as adimistrator”